# Function ceil Round a value towards plus infinity If `x` is complex, both real and imaginary part are rounded towards plus infinity. For matrices, the function is evaluated element wise. ## Syntax ```js math.ceil(x) math.ceil(x, n) ``` ### Parameters Parameter | Type | Description --------- | ---- | ----------- `x` | number | BigNumber | Fraction | Complex | Array | Matrix | Number to be rounded `n` | number | BigNumber | Array | Number of decimals Default value: 0. ### Returns Type | Description ---- | ----------- number | BigNumber | Fraction | Complex | Array | Matrix | Rounded value ## Examples ```js math.ceil(3.2) // returns number 4 math.ceil(3.8) // returns number 4 math.ceil(-4.2) // returns number -4 math.ceil(-4.7) // returns number -4 math.ceil(3.212, 2) // returns number 3.22 math.ceil(3.288, 2) // returns number 3.29 math.ceil(-4.212, 2) // returns number -4.21 math.ceil(-4.782, 2) // returns number -4.78 const c = math.complex(3.24, -2.71) math.ceil(c) // returns Complex 4 - 2i math.ceil(c, 1) // returns Complex 3.3 - 2.7i math.ceil([3.2, 3.8, -4.7]) // returns Array [4, 4, -4] math.ceil([3.21, 3.82, -4.71], 1) // returns Array [3.3, 3.9, -4.7] ``` ## See also [floor](floor.md), [fix](fix.md), [round](round.md)